ZstdSharp

ZstdSharp is a port of zstd compression library to С#
Based on Zstandard v1.5.1
Supports .NET Core 3.1, .NET 5, .NET 6, .NET Standard 2.0+, .NET Framework 4.6.1+

Usage

ZstdSharp has an unsafe API much the same as zstd.
There are also safe wrappers.

Compress:

var src = File.ReadAllBytes("dickens");
using var compressor = new Compressor(level);
var compressed = compressor.Wrap(src);

Decompress:

var src = File.ReadAllBytes("dickens.zst");
using var decompressor = new Decompressor();
var decompressed = decompressor.Unwrap(src);

Benchmark

Best performance is achieved on .NET Core. System.Runtime.Intrinsics namespace is required for hardware accelerated bit and vector operations. .NET Standard and .NET Framework will use software implementation

Comparision zstd (native) and ZstdSharp

BenchmarkDotNet=v0.13.1, OS=Windows 10.0.19043.1415 (21H1/May2021Update)
Intel Core i7-2600K CPU 3.40GHz (Sandy Bridge), 1 CPU, 8 logical and 4 physical cores
.NET SDK=6.0.101
  [Host]     : .NET 6.0.1 (6.0.121.56705), X64 RyuJIT
  DefaultJob : .NET 6.0.1 (6.0.121.56705), X64 RyuJIT

Compression level 1

Method	Mean	Error	StdDev	Ratio	RatioSD	InstructionRetired/Op
CompressNative	45.26 ms	0.750 ms	0.702 ms	1.00	0.00	399,751,515
CompressSharp	64.31 ms	0.310 ms	0.259 ms	1.42	0.03	524,542,857
DecompressNative	14.27 ms	0.281 ms	0.335 ms	1.00	0.00	155,238,636
DecompressSharp	20.06 ms	0.102 ms	0.085 ms	1.41	0.03	188,704,167

Compression level 5

Method	Mean	Error	StdDev	Median	Ratio	RatioSD	InstructionRetired/Op
CompressNative	153.35 ms	3.049 ms	8.747 ms	150.53 ms	1.00	0.00	1,103,210,938
CompressSharp	198.80 ms	3.927 ms	8.368 ms	195.48 ms	1.29	0.08	1,527,494,444
DecompressNative	17.01 ms	0.226 ms	0.212 ms	16.97 ms	1.00	0.00	206,341,667
DecompressSharp	25.86 ms	0.513 ms	1.037 ms	25.58 ms	1.56	0.07	261,462,010